a) what done: participants were assigned to receive
Vitamin E or a placebo

b) for what
purpose: to determine the effects of Vitamin E on the rate of pogression of
Alzheimer’s disease

(you can answer this all in 1
simple sentence, just address both parts a and b)

2.
Controls:

a)was
the experiment controlled? Yes

b)Treatment
group = people who took Vitamin E

c)Control
group = people who took a placebo

Explicit protocol

relevant: yes

status: present

quotes: “patients were
randomly assigned to groups receiving a drug Aricept, vitamin E, and
placebo versions of those substances.”

Replication

relevant: yes

status: present

quotes: “researchers studied
769 patients”

Standards

relevant: yes

status: present

3. quotes: “At the end of one year, significant
differences appeared: 38 patients in the placebo group and 33 in the vitamin E
group had Alzheimer’s, compared with only 16 in the Aricept group. But among
the 214 patients who progressed to Alzheimer’s over the entire 3 year course of
the study, there was no significant difference among the three test groups.”

Randomization

relevant: yes

status: present

quotes: “patients were
randomly assigned to groups receiving..”

Blind

relevant: yes

status: present

quotes: “patients were
randomly assigned to groups receiving a drug Aricept, vitamin E, and placebo
versions of those substances.”

NOTE: Placebo will be accepted as
evidence that study was done blindly.